722020709 has 2 divisors, whose sum is σ = 722020710. Its totient is φ = 722020708.

The previous prime is 722020679. The next prime is 722020751. The reversal of 722020709 is 907020227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 503867809 + 218152900 = 22447^2 + 14770^2 .

It is a cyclic number.

It is not a de Polignac number, because 722020709 - 2¹² = 722016613 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722020769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361010354 + 361010355.

It is an arithmetic number, because the mean of its divisors is an integer number (361010355).

Almost surely, 2^722020709 is an apocalyptic number.

It is an amenable number.

722020709 is a deficient number, since it is larger than the sum of its proper divisors (1).

722020709 is an equidigital number, since it uses as much as digits as its factorization.

722020709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 722020709 is about 26870.4430369133. The cubic root of 722020709 is about 897.1186489817.

The spelling of 722020709 in words is "seven hundred twenty-two million, twenty thousand, seven hundred nine".